Electrically tunable dual-band extraordinary transmission with a graphene hybrid metasurface

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Optical Materials Pub Date : 2025-04-01 DOI:10.1016/j.optmat.2025.117014

Yujing Zhang, Jiameng Nan, Weiqi Cai, Jing Xu, Hongkui Shi, Fuli Zhang, Yuancheng Fan

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Abstract

Metasurface is a kind artificial composite composed of subwavelength structures arranged for novel optical properties. Here we propose and demonstrate a metasurface made of hybrid metal-graphene structure for electrically tunable dual-band electromagnetic extraordinary optical transmission (EOT). Considering the tunability of the conductivity of graphene with applied voltage as well as the freely designed EOT operating in independent frequency bands, the transmission of the dual-band EOT can be efficiently controlled by tuning the biasing voltage on the graphene layer. The electrical tunability of the dual-band EOT behavior is confirmed by full-wave simulation and experimental characterization. The measured results show that the designed metasurface achieves 57.6 % and 32.2 % transmittance at 9.49 GHz and 11.47 GHz, respectively, and 45.7 % and 28 % modulation are achieved when the graphene is biased. The proposed hybrid metasurface enriches the modulation mechanism of electromagnetic EOT behavior through tunable properties of graphene and has certain application prospects in sensors and filter devices.

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石墨烯混合超表面的电可调谐双频非凡传输

超表面是一种由亚波长结构组成的具有新型光学性能的人工复合材料。在这里，我们提出并展示了一种由金属-石墨烯混合结构制成的用于电可调谐双频电磁超光传输（EOT）的超表面。考虑到石墨烯电导率随外加电压的可调性以及自由设计的EOT在独立频段工作，可以通过调节石墨烯层上的偏置电压来有效地控制双频段EOT的传输。通过全波仿真和实验表征证实了双波段EOT行为的电可调性。测量结果表明，所设计的超表面在9.49 GHz和11.47 GHz的透射率分别达到57.6%和32.2%，石墨烯偏置时的调制率分别达到45.7%和28%。所提出的混合超表面通过石墨烯的可调谐特性丰富了电磁EOT行为的调制机制，在传感器和滤波器件中具有一定的应用前景。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.